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| author | Bjorn Helgaas <bhelgaas@google.com> | 2013-12-15 17:23:54 -0700 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-12-15 18:00:00 -0700 |
| commit | af9ab791e34147952a8b97c998fa257d8292c5d6 (patch) | |
| tree | b449d89e5635d37cc310edce104511b847547dcb /drivers/pci/hotplug/pciehp_hpc.c | |
| parent | e7b4f0d7841b188423b641cab71d20b1a05234e9 (diff) | |
| download | op-kernel-dev-af9ab791e34147952a8b97c998fa257d8292c5d6.zip op-kernel-dev-af9ab791e34147952a8b97c998fa257d8292c5d6.tar.gz | |
PCI: pciehp: Move Attention & Power Indicator support tests to accessors
Previously, the caller checked ATTN_LED() or PWR_LED() to see whether the
slot has indicators before setting the indicator state. That clutters the
caller unnecessarily, so this moves the test inside the callees. The test
may not even be necessary; per spec it should be harmless to try to turn on
a non-existent LED. But checking first does avoid unnecessary hotplug
commands.
No functional change.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/hotplug/pciehp_hpc.c')
| -rw-r--r-- | drivers/pci/hotplug/pciehp_hpc.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index 05d421c..14acfcc 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -418,6 +418,9 @@ void pciehp_set_attention_status(struct slot *slot, u8 value) struct controller *ctrl = slot->ctrl; u16 slot_cmd; + if (!ATTN_LED(ctrl)) + return; + switch (value) { case 0 : /* turn off */ slot_cmd = PCI_EXP_SLTCTL_ATTN_IND_OFF; @@ -440,6 +443,9 @@ void pciehp_green_led_on(struct slot *slot) { struct controller *ctrl = slot->ctrl; + if (!PWR_LED(ctrl)) + return; + pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_IND_ON, PCI_EXP_SLTCTL_PIC); ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, @@ -450,6 +456,9 @@ void pciehp_green_led_off(struct slot *slot) { struct controller *ctrl = slot->ctrl; + if (!PWR_LED(ctrl)) + return; + pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF, PCI_EXP_SLTCTL_PIC); ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, @@ -460,6 +469,9 @@ void pciehp_green_led_blink(struct slot *slot) { struct controller *ctrl = slot->ctrl; + if (!PWR_LED(ctrl)) + return; + pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_IND_BLINK, PCI_EXP_SLTCTL_PIC); ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, |
